Long-Term Debt - Schedule of Long-Term Debt Instruments (Details) £ in Millions, $ in Millions, $ in Millions	Sep. 30, 2024 USD ($)	Sep. 30, 2024 GBP (£)	Sep. 30, 2024 CAD ($)	Sep. 30, 2024 AUD ($)	Dec. 31, 2023 USD ($)
Long Term Debt
Total long-term debt	$ 1,878,000,000				$ 1,629,200,000
Less: current portion	(745,800,000)				(209,700,000)
Net long-term debt	1,132,200,000				1,419,500,000
U.S. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	0				0
U.K. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	$ 81,600,000	£ 61.0			$ 0
3.50% senior subordinated notes due 2025
Debt Instrument [Line Items]
Interest rate	3.50%	3.50%	3.50%	3.50%	3.50%
Long Term Debt
Total long-term debt	$ 548,800,000				$ 547,700,000
3.75% senior subordinated notes due 2029
Debt Instrument [Line Items]
Interest rate	3.75%	3.75%	3.75%	3.75%	3.75%
Long Term Debt
Total long-term debt	$ 496,400,000				$ 495,800,000
Canada credit agreement
Long Term Debt
Total long-term debt	89,500,000		$ 121.0		81,500,000
Australia credit agreement
Long Term Debt
Total long-term debt	46,000,000.0			$ 100.0	62,700,000
Mortgage facilities
Long Term Debt
Total long-term debt	570,400,000				402,100,000
Other
Long Term Debt
Total long-term debt	$ 45,300,000				$ 39,400,000